He met his future wife, Glynnis Campbell, when they were both children and he saved her from some bullies. (DC Star Trek Annual #3)

Montgomery Scott's first meeting with future shipmates and friends Spock and Leonard McCoy was in a spaceport waiting lounge in 2232, though Spock was then a toddler with his parents, Sarek and Amanda Grayson, and Scott and McCoy didn't tell each other their names. (Arc of the Wolf: "Wait")

While still in his teens, Scott disproved Alejandro Perera's theory regarding the vulnerability of linked Klingondeflector shields, which earned him the attention of Starfleet Academy recruiters. The formalized experiment was dubbed the Aberdeen Solution, also earning Scott a place in the history books at the age of sixteen. (TOS novel: The Kobayashi Maru, Arc of the Wolf: "Junkyard Dogs")

Contents

Montgomery Scott's best friend and roommate at Starfleet Academy's Engineering School in Belfast, Ireland, was Andrew "Corry" Corrigan. He was the head shipwright for the schooner Lady Grey, part of his final exam for Historical Engineering. After planning and executing a number of relatively minor crimes in conjunction to events centered on the schooner, he was court-martialed and convicted of a number of charges, leading to him spending three years on corrective action, working first at Lunar Spaceport, then the San Francisco Fleet Yards as a technician. (Arc of the Wolf:"On the Nature of Wind")

The vessel he was assigned to was the UFP F/V Horizon Sun. In February of 2248, the Horizon Sun was caught in the crossfire of a skirmish and lost all propulsion. In a daring, if dangerous, move then Ensign Scott managed to bypass both blown safeties and relays in order to buy the stricken vessel time to jump to warp 1 and escape the crossfire. He subsequently had a bulkhead land on him, nearly ending his life. He also earned a commendation for his courage in saving the ship from near certain destruction. (Arc of the Wolf: Below Forty South: "Forty-Eight")

Arc of the Wolf continuity has the Denevan run c. 2248, while Orion Press has it in 2259.

In Orion Press continuity, in 2249 Scott concluded a tour of duty on the USS Schirra and became technical assistant to a professor at the Academy. ("By the Back Door")

In Arc of the Wolf continuity, Scott was transferred back to Earth for several months of physical therapy. In order to resume active duty, he had to pass a full physical and psychological screening, requiring a unanimous agreement of a full board of review. He succeeded and was assigned to the USS Churchill. Onboard the Churchill, he received high marks from Captain Huntington for his initiative and work ethic, and despite only being an Ensign, often found himself essentially running the department over top of the Churchill's actual chief engineer.

In early 2250 the Churchill was sent on a covert ops mission by Starfleet Intelligence to verify a clandestine arrangement between the Klingon Empire and the Kzinti Patriarchy and obtain evidence of a classified weapon being developed on a moon at the edge of Kzinti space. Scott was assigned to the landing party sent to infiltrate the base.

Mere days after the successful mission, the Churchill was taken and boarded by hostile forces, with most of the crew being murdered in the take over. The incident was classified. Scott was one of two survivors, having been working in the engineering hull and separate from the crew, and received his second commendation for successfully evading capture and sabotaging the Churchill before she could be taken into enemy territory. The USS Enterprise, under Captain Robert April, was the vessel to retake the ship.

April, who had prior voted to convict Scott in his court martial, made a request personally to the Director of Personnel that Scott be promoted and assigned to the USS Enterprise, provided he could be cleared for active duty after having witnessed the tragedy of the Churchill. After much contemplation, the request was approved. (Traces of Winter)

Lieutenant J.G. Scott began his tenure aboard the Constitution-classUSS Enterprise, c. 2250, reporting to Chief EngineerCaitlin Barry. Christopher Pike commanded Enterprise at this time. (Vulcan's Glory) After an initial settling in period wherein he handled his position well, eventually the lingering trauma of the Churchill began to cause rifts between himself and the crew. After nearly transferring him off-ship, Chief Barry managed to piece together the fact that the junior lieutenant was suffering survivor's guilt and undiagnosed PTSD and came up with an informal corrective action strategy to pull him back on track and help remove the self-assumed burden of responsibility from his shoulders. (Hierarchy)

After two years and Scott's climb to third watch supervisor, Captain Pike put Scott on the bridge for the occasional command rotation, citing Scott's experience in Command School. (Middle Watch) Over the course of the next three years, Scott worked towards gaining the command rating which he had dodged as a cadet, under the encouragement of Captain Pike.

Pocket Books and Arc of the Wolf continuity has Scott assigned to Enterprise through much of the 2250s, while Orion Press has him as an Academy instructor and later professor during this period.

When James T. Kirk assumed command of Enterprise from Fleet Captain Pike in 2264, Scott had doubts about his new captain, mostly centering around his youth. "Inexperienced young tyro" was one phrase he used. (TOS novel: Enterprise: The First Adventure) Over the course of this five-year mission, Kirk's and Scott's regard for each other would evolve to the point where Scott called Kirk "Jim" in a moment of crisis. (TOS: "Mirror, Mirror")

In 2280, Scott and Glynnis Campbell married on a five-year contract. (DC Star Trek Annual #3)

Scott's nephew Peter Preston, by then an Academy midshipman first class, was assigned to Enterprise for a cadet cruise in 2285. During an attack by Khan Noonien Singh, who had commandeered USS Reliant, Preston was in Enterprise's engineering section when it was struck by phaser fire. The young midshipman suffered horrific injuries to which he eventually succumbed. Scott took his nephew's death very personally, but would soon suffer another great loss: that of his friend and superior officer, Spock. (Star Trek II: The Wrath of Khan)

During the so-called Whalesong Crisis, Scott traveled back in time with James Kirk, Spock and several other Enterprise officers to the year 1986 to help bring two humpback whales forward to the 23rd century and communicate with an alien probe. While in the past, Scott may have been part of a predestination paradox by giving a 20th-century scientist the formula for transparent aluminum. (Star Trek IV: The Voyage Home)

Scott learned in 2286 that his now ex-wife Glynnis had died in a shuttlecraft accident while he and his shipmates had been in exile on Vulcan. (DC Star Trek Annual #3: "Retrospect"; "Roads Not Taken")

Depending upon continuity, in Scott's family, the tradition could be for a man to inherit a patrilineal surname, and a woman to inherit a matrilineal one, which is why Dannan and Peter had different surnames in some sources, (Star Trek III: The Search for Spock novelization), or for naming conventions to follow a more liberal standard according to others. (Arc of the Wolf)

Montgomery Scott's parents have different names in different continuities:

Stephen Whitfield's bio for Scott in The Making of Star Trek (1968) asserts that Scott's ancestors included famous explorers, including one of the first men to walk on the moon. Interestingly enough, David Scott's Apollo 15 mission would not take place until three years after the book was published.